1 : Smoke Signal Guide

Because signals were visible to everyone, including enemies, meanings were often pre-arranged between specific senders and receivers to maintain secrecy. However, several general codes became common:

: Since the 19th century, the College of Cardinals has used smoke to announce election results: black smoke indicates a failed vote, while white smoke signals a new pope. Core Signaling Language 1 : Smoke Signal

: Tribes such as the Apache and Coeur d'Alene developed precise signaling methods using damp grass to create thick columns of white smoke. Because signals were visible to everyone, including enemies,